Uh oh. Nothing is ever really private and sacred in Hollywood, is it? If you're an actress like Katharine McPhee,you should know that your photo is going to eventually get snapped if you go around kissing the married man who directed the TV show that made you even more of a household name. And yet, Kat was caught smooching former Smash director Michael Morris and, well, that cat is out of the bag now. But the couple's openness about it -- they shared a kiss in what looks like an outdoor parking lot -- leads me to believe we shouldn't jump down their throats just because they are both, technically, married to other people.

Of the two of them, Morris has the more public relationship, as he's married to actress Mary McCormack and they have three daughters together whose ages range from 2 to 9. Katharine, who does not have children, is married to producer Nick Cokas, but rumor has it the two have been separated for six months.

Even though Smash was recently cancelled -- and maybe even because of this fact -- it makes sense that Katharine would be close to Michael. Let's face it: it's easy to develop a crush on someone we work with because we often see that person more than we see our own spouses. We share triumphs at work when things are going well for us professionally, and we buy each other beers at happy hour when we feel like commiserating over that jerky thing our boss did to us that morning.

There are about a million examples of actors and actresses who developed feelings for each other after working together -- oh, Rob Pattinson and Kristen Stewart, of course I'm thinking of you -- but there are just as many actresses who have fallen head over heels for their directors. Sam Mendes directed Kate Winslet in Revolutionary Road and helped her win a Golden Globe Award for Best Actress. Robert Rodriguez left his wife of 16 years to be with Rose McGowan after they filmed Grindhouse. Helena Bonham is still going strong with Tim Burton after he directed her in The Planet of the Apes in 2001.

And (cough, cough) I believe Kristen S. may have had another little fling with married director Rupert Sanders.

In real life, the trick is not to get too close to someone else when you value your relationship, but something tells me the rules are a little more lax in La La Land. Still, I hope we find out that both Katharine and Michael are separated and that both their partners are aware of what's going on -- and as cool with it as possible.

Do you think it's appropriate to kiss other people if your marriage isn't completely over?